1400442157 has 2 divisors, whose sum is σ = 1400442158. Its totient is φ = 1400442156.

The previous prime is 1400442149. The next prime is 1400442217. The reversal of 1400442157 is 7512440041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746054596 + 654387561 = 27314^2 + 25581^2 .

It is an emirp because it is prime and its reverse (7512440041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400442157 - 2³ = 1400442149 is a prime.

It is a super-2 number, since 2×1400442157² = 3922476470205625298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400442457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700221078 + 700221079.

It is an arithmetic number, because the mean of its divisors is an integer number (700221079).

Almost surely, 2^1400442157 is an apocalyptic number.

It is an amenable number.

1400442157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400442157 is an equidigital number, since it uses as much as digits as its factorization.

1400442157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 1400442157 is about 37422.4819727393. The cubic root of 1400442157 is about 1118.8067001963.

Adding to 1400442157 its reverse (7512440041), we get a palindrome (8912882198).

The spelling of 1400442157 in words is "one billion, four hundred million, four hundred forty-two thousand, one hundred fifty-seven".